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JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

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JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

MOQ:	1 tonelada
preço:	Negociável
Embalagem padrão:	Em feixes ou em caixas de madeira.
Período de entrega:	20-40 dias
método de pagamento:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Capacidade de abastecimento:	60000 toneladas/toneladas por ano

Informação de detalhes

Descrição do produto

Informações pormenorizadas

Lugar de origem

Zhejiang/China

Marca

TORICH

Certificação

ISO9001 ISO 14001 TS16949

Número do modelo

JIS G3444

Nota:

STK290 STK400 STK490 STK500 STK540

Grossura:

10 - 200 milímetros

Aplicativo:

Objetivo estrutural geral

Padrão:

Certificação:

CE,BV,ISO9001,API,ISO

Liga ou não:

Não é liga, é liga.

Técnica:

Cold Desenho, Cold Desenho/Colling Rolling/Cold Drawn Honed/Cold Drawn-roll

Secundário ou não:

Não secundário

Forma de seção:

Redondo

Diâmetro externo (redonda):

10 - 630 mm

Tubo especial:

Tubos de aço sem costura de precisão

Superfície:

Requisitos dos clientes

Forma:

Forma redonda

Nome do produto:

tubos de aço sem costura

Tipo:

Tubulação de aço redonda sem emenda

Descrição do produto

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 0

JIS G3444 Carbon Steel Seamless Tubes (STK290 / STK400 / STK490 / STK500 / STK540) for General Structural Purpose

Material Overview

These are carbon steel seamless or welded tubes conforming to Japanese Industrial Standard JIS G3444. They are designed for general structural use: civil engineering, architecture, piles, frameworks, etc. The grades STK290, STK400, STK490, STK500, STK540 denote different strength levels.

Specification

Property	Details
Standard	JIS G3444 (e.g. version 2006 / 2021)
Grades	STK290, STK400, STK490, STK500, STK540
Forms	Seamless, Electric Resistance Welded (ERW), Automatic Arc Welded, Butt Welded
Outer Diameter Range	~21.7 mm to 1016.0 mm
Wall Thickness Range	~2.0 mm to ~22 mm (depending on OD etc.)

Chemical Composition

Grade	C (max)	Si (max)	Mn (max) / range	P (max)	S (max)
STK290	–	–	–	0.050 %	0.050 %
STK400	0.25 %	–	–	0.040 %	0.040 %
STK490	0.18 %	0.55 %	1.65 %	0.035 %	0.035 %
STK500	0.24 %	0.35 %	0.30 ‒ 1.30 %	0.040 %	0.040 %
STK540	0.23 %	0.55 %	1.50 %	0.040 %	0.040 %

Mechanical Properties

Here are the mechanical property minima required by the standard for the different grades. This covers tensile strength, yield or proof stress, weld-zone tensile strength, bending & flattening tests. Elongation also specified.

Grade	Tensile Strength, min (Rm) [N/mm²]	Yield Point / Proof Stress, min [N/mm²]	Weld Tensile Strength, min [N/mm²]	Elongation, min %	Flattening / Bend Tests
STK290	290	—	290	30 % (Seamless & Butt welded) / 30 % (ERW etc.) / smaller reductions for larger OD or other methods	Flattening: distance between flat plates = 2/3 D; Bend: 90° bend, inside radius = 6D
STK400	400	235	400	~23 % for most tube manufacturing; lower for certain large diameters or weld types	Flattening: 2⁄3 D; Bend: 90°, 6D
STK490	490	315	490	~23 % or similar; reduced in certain test piece directions or larger ODs	Flattening: 7⁄8 D; Bend: 90°, 6D
STK500	500	355	500	somewhat lower elongation (~15-18 %) for larger tubes or more highly worked materials; see standard	Flattening: 7⁄8 D; Bend: 90°, 8D
STK540	540	390	540	similar to STK500, depending on OD and method; elongation tends to drop somewhat with the higher strength grades	Flattening: 7⁄8 D; Bend: 90°, 8D

Key Features

Graded Strength Levels: Users can select the grade according to structural needs— from basic strength (STK290) to high strength (STK540).
Versatility in Manufacturing: Available seamless or welded, with finishing options. Allows adaptation to application demands and cost/performance trade-offs.
Good Ductility / Toughness especially in lower grades—ensures resistance to brittle failure, suitable for bending, welding, fabrication.
Rigorous Quality Tests: Flattening, bend tests, weld tensile strength etc. help ensure integrity.
Dimensional & Tolerance Standards ensure interchangeability and predictable behavior.

Applicable Standards

JIS G3444 itself is the primary executing standard.
Related standards for chemical analyses and finished product analysis: JIS G0320 (heat / melt analysis), JIS G0321 (product analysis)
Mechanical test method standards cited or used in conjunction: flattening test, bending test, tensile test etc. (within JIS G3444).

Application Domains

Domain	Specific Uses
Civil Engineering & Construction	Support columns, beams, frameworks, building facades, scaffolding, footings, piles for foundations, retaining structures, structural bracing.
Infrastructure	Piles for bridges, piles for landslide suppression, retaining walls, utility structures.
Architectural Structures	Towers, handrails, perimeter fences, decorative structures where structural load + aesthetic finish needed.
Industrial Buildings / Equipment	Frameworks, supports for equipment, overhead structures, racks, platforms.
Temporary / Modular Structures	Scaffolding systems, temporary shelters, shipping container adaptations.

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 1

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 2

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 4

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 6

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Etiquetas:

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Tubulação de aço galvanizada sem emenda,

tubo sem emenda laminado

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Detalhes dos produtos

produtos

Tubo sem emenda do aço da precisão

tubo de aço estirado a frio sem emenda

Tubo do aço do cilindro hidráulico

Peças fazendo à máquina do CNC

Peças de alumínio do CNC

Peças de bronze do CNC

Peças de gerencio do CNC

Tubo do aço do permutador de calor

tubo de aço carbono

tubo do aço de liga

Tubo de aço soldado

tubo do aço estrutural

Tubulação de aço automotivo

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

MOQ:	1 tonelada
preço:	Negociável
Embalagem padrão:	Em feixes ou em caixas de madeira.
Período de entrega:	20-40 dias
método de pagamento:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Capacidade de abastecimento:	60000 toneladas/toneladas por ano

Informações pormenorizadas

Descrição do produto

Informações pormenorizadas

Lugar de origem

Zhejiang/China

Marca

TORICH

Certificação

ISO9001 ISO 14001 TS16949

Número do modelo

JIS G3444

Nota:

STK290 STK400 STK490 STK500 STK540

Grossura:

10 - 200 milímetros

Aplicativo:

Objetivo estrutural geral

Padrão:

ASTM

Certificação:

CE,BV,ISO9001,API,ISO

Liga ou não:

Não é liga, é liga.

Técnica:

Cold Desenho, Cold Desenho/Colling Rolling/Cold Drawn Honed/Cold Drawn-roll

Secundário ou não:

Não secundário

Forma de seção:

Redondo

Diâmetro externo (redonda):

10 - 630 mm

Tubo especial:

Tubos de aço sem costura de precisão

Superfície:

Requisitos dos clientes

Forma:

Forma redonda

Nome do produto:

tubos de aço sem costura

Tipo:

Tubulação de aço redonda sem emenda

Quantidade de ordem mínima:

1 tonelada

Preço:

Negociável

Detalhes da embalagem:

Em feixes ou em caixas de madeira.

Tempo de entrega:

20-40 dias

Termos de pagamento:

L/C, D/A, D/P, T/T, Western Union, MoneyGram

Habilidade da fonte:

60000 toneladas/toneladas por ano

Descrição do produto

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 0

JIS G3444 Carbon Steel Seamless Tubes (STK290 / STK400 / STK490 / STK500 / STK540) for General Structural Purpose

Material Overview

Specification

Property	Details
Standard	JIS G3444 (e.g. version 2006 / 2021)
Grades	STK290, STK400, STK490, STK500, STK540
Forms	Seamless, Electric Resistance Welded (ERW), Automatic Arc Welded, Butt Welded
Outer Diameter Range	~21.7 mm to 1016.0 mm
Wall Thickness Range	~2.0 mm to ~22 mm (depending on OD etc.)

Chemical Composition

Grade	C (max)	Si (max)	Mn (max) / range	P (max)	S (max)
STK290	–	–	–	0.050 %	0.050 %
STK400	0.25 %	–	–	0.040 %	0.040 %
STK490	0.18 %	0.55 %	1.65 %	0.035 %	0.035 %
STK500	0.24 %	0.35 %	0.30 ‒ 1.30 %	0.040 %	0.040 %
STK540	0.23 %	0.55 %	1.50 %	0.040 %	0.040 %

Mechanical Properties

Grade	Tensile Strength, min (Rm) [N/mm²]	Yield Point / Proof Stress, min [N/mm²]	Weld Tensile Strength, min [N/mm²]	Elongation, min %	Flattening / Bend Tests
STK290	290	—	290	30 % (Seamless & Butt welded) / 30 % (ERW etc.) / smaller reductions for larger OD or other methods	Flattening: distance between flat plates = 2/3 D; Bend: 90° bend, inside radius = 6D
STK400	400	235	400	~23 % for most tube manufacturing; lower for certain large diameters or weld types	Flattening: 2⁄3 D; Bend: 90°, 6D
STK490	490	315	490	~23 % or similar; reduced in certain test piece directions or larger ODs	Flattening: 7⁄8 D; Bend: 90°, 6D
STK500	500	355	500	somewhat lower elongation (~15-18 %) for larger tubes or more highly worked materials; see standard	Flattening: 7⁄8 D; Bend: 90°, 8D
STK540	540	390	540	similar to STK500, depending on OD and method; elongation tends to drop somewhat with the higher strength grades	Flattening: 7⁄8 D; Bend: 90°, 8D

Key Features

Graded Strength Levels: Users can select the grade according to structural needs— from basic strength (STK290) to high strength (STK540).
Versatility in Manufacturing: Available seamless or welded, with finishing options. Allows adaptation to application demands and cost/performance trade-offs.
Good Ductility / Toughness especially in lower grades—ensures resistance to brittle failure, suitable for bending, welding, fabrication.
Rigorous Quality Tests: Flattening, bend tests, weld tensile strength etc. help ensure integrity.
Dimensional & Tolerance Standards ensure interchangeability and predictable behavior.

Applicable Standards

JIS G3444 itself is the primary executing standard.
Related standards for chemical analyses and finished product analysis: JIS G0320 (heat / melt analysis), JIS G0321 (product analysis)
Mechanical test method standards cited or used in conjunction: flattening test, bending test, tensile test etc. (within JIS G3444).

Application Domains

Domain	Specific Uses
Civil Engineering & Construction	Support columns, beams, frameworks, building facades, scaffolding, footings, piles for foundations, retaining structures, structural bracing.
Infrastructure	Piles for bridges, piles for landslide suppression, retaining walls, utility structures.
Architectural Structures	Towers, handrails, perimeter fences, decorative structures where structural load + aesthetic finish needed.
Industrial Buildings / Equipment	Frameworks, supports for equipment, overhead structures, racks, platforms.
Temporary / Modular Structures	Scaffolding systems, temporary shelters, shipping container adaptations.

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 1

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 2

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 4

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 6

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Etiquetas: